<template>
  <div class="row">
    <!--展示用户列表-->
    <div v-show="info.users.length" class="card" v-for="user in info.users" :key="user.login">
      <a :href="user.html_url" target="_blank">
        <img :src="user.avatar_url" style='width: 100px'/>
      </a>
      <p class="card-text">{{ user.login }}</p>
    </div>
    <!---欢迎词-->
    <h1 v-show="info.isFirst">欢迎使用！</h1>
    <!--加载中--->
    <h1 v-show="info.isLoading">加载中...</h1>
    <!---错误信息-->
    <h1 v-show="info.errMsg">请求出错了, 错误信息: {{ info.errMsg }}</h1>
    
  </div>
</template>

<script>
  export default {
    name: 'List',
    data(){
      return {
        info: {
          isFirst: true,
          isLoading: false,
          errMsg: '',
          users: []
        }
      }
    },

    mounted(){
      this.$bus.$on('updateListData', (dataObj) => {
        // this.info = dataObj  //此写法有将isFirst搞丢的缺陷
        this.info = {...this.info, ...dataObj}  //ES6写法，通过字面量形式合并对象
      })
    },
    beforeDestroy(){
      this.$bus.$off('updateListData')
    }

  }
</script>

<style scoped>
.album {
  min-height: 50rem; /* Can be removed; just added for demo purposes */
  padding-top: 3rem;
  padding-bottom: 3rem;
  background-color: #f7f7f7;
}

.card {
  float: left;
  width: 33.333%;
  padding: .75rem;
  margin-bottom: 2rem;
  border: 1px solid #efefef;
  text-align: center;
}

.card > img {
  margin-bottom: .75rem;
  border-radius: 100px;
}

.card-text {
  font-size: 85%;
}
</style>